St. Paul, Minnesota, sees its fair share of cold winters. To disprove its reputation as an uninhabitable tundra, the city started holding an annual winter carnival. Each year, the main feature is a gorgeous, sprawling ice palace. The 2004 palace, seen here, was so large that workers used 27,000 blocks of ice to construct it. The highest turret dwarfs the crowd below with a height of 75 feet.